Pilot Study of the KineSpring® System to Evaluate Symptom Relief in Patients With Medial Knee Osteoarthritis

The KineSpring System is indicated to treat symptoms of pain and loss of knee function in
patients with a diagnosis of osteoarthritis or post-traumatic osteoarthritis in the medial
compartment of the knee. The KineSpring System is indicated for patients with osteoarthritis
of severity that does not require knee joint replacement.

Inclusion Criteria (Significant criteria only. Others also apply):

- Patients with symptoms of knee pain and loss of knee function.

- Patients with a diagnosis of osteoarthritis or post-traumatic osteoarthritis in the
medial compartment of the knee.

- Radiographic confirmation of mild to moderate medial compartment knee OA

Exclusion Criteria (Significant criteria only. Others also apply):

- Patients that that require knee joint replacement.

- Symptomatic OA in lateral compartment or patellofemoral compartment.

- Known sensitivity to metals including cobalt, chromium, iron, or nickel

- Rheumatoid arthritis, other forms of inflammatory joint disease